I can thoroughly recommend the Timberpro 20" with Oregon Bar and chain. I purchased one a while back from Micromantis, got change from £100 believe it or not, 2 year warranty and spares on the shelf at the suppliers. I have been using it with an Alaskan mill so it works very hard. I couldn't believe it..... And with the two year warranty its going to last at least two years. The reviews on the web are good.
I wouldn't want to earn my living with it fir that it would be a pro saw, but for under £100 a time the Timberpro is cheap reliable and at 61cc handles even the milling.
S.